Paster anticipate circuit

Claim 2

In a digital control system for timing the splicing of the web from a new roll to a running web drawn from an expiring roll in which system preliminary operations are to be performed to make ready the new roll for splicing, the combination comprising first pulse generating means operatively associated with the expiring roll for producing a reference pulse during a portion of each revolution thereof, second pulse generating means associated with the running web for producing timing pulses at a rate proportional to the speed of the running web, a first counter selectively coupled to said second pulse generating means and rendered operative at the trailing edge of the reference pulse for counting the timing pulses and producing a first control pulse when a preset number of timing pulses have been counted, means responsive to the first control pulse for generating a second control pulse of a fixed time duration, a source of auxiliary pulses at a constant frequency, a second counter selectively coupled to receive said timing pulses and said auxiliary pulses for producing a third control pulse when a preset number has been counted, and counter control means including a bistable circuit having a first stable state initiated by the trailing edge of said second control pulse during which counting by said second counter takes place and a second stable state initiated by said third control pulse during which said second counter is reset to a zero count, first coincidence sensing means coupled to said bistable circuit and said first pulse generating means for producing a first output signal in response to said first stable state and said reference pulse timingly overlapping, said first output signal always occurring a fixed time interval in advance of a second output signal irrespective of the speed of the web, and second coincidence sensing means responsive to portions of the second control pulse and the reference pulse timingly overlapping to generate said second output signal to initiate said preliminary operations.

Claim 7

In a control system for a printing press whose linear printing velocity may be varied, for initiating splicing of a web on a new roll to a web running from a rotated expiring roll in response to a splice control signal originated at a predetermined expiring roll diameter, and for initiating preliminary make-ready of the web on the new roll in response to a make-ready control signal originated at a time in advance of said splice control signal which is varied as a function of printing press web velocity, means developing an anticipate control signal originated at a time in advance of said make-ready control signal which is of constant duration irrespective of printing press web velocity and comprising, in combination, first pulse generating means producing a reference pulse during a portion of each revolution of said expiring roll, second pulse generating means activated in each period of revolution of the expiring roll at a constant time relative to said reference pulse and producing a first enabling pulse whose time position following said reference pulse approaches a succeeding reference pulse with diminishing expiring roll diameter and varies as a function of printing press web velocity, coincidence circuit means originating said splice control signal when a succeeding one of said reference pulses and said first enabling pulse coincide in time, third pulse generating means activated in each period of revolution of the expiring roll at a constant time following said first enabling pulse and producing a second enabling pulse whose time position with respect to said first enabling pulse is constant irrespective of printing press web velocity, coincidence circuit means originating said make-ready contrOl signal when said succeeding one of said reference pulses and said second enabling pulse coincide in time, fourth pulse generating means activated in each period of revolution of the expiring roll at a constant time relative to said second enabling pulse and producing a third enabling pulse whose time position with respect to said second enabling pulse varies as an inverse function of printing press web velocity; and coincidence circuit means originating said anticipate control signal when said succeeding one of said reference pulses and said third enabling pulse coincide in time, said anticipate control signal existing a constant time in advance of said splice control signal irrespective of printing press web velocity.

Claim 8

In a control system for a printing press whose linear printing velocity may be varied, for initiating splicing of a web on a new roll to a web running from a rotated expiring roll in response to a splice control signal originated at a predetermined expiring roll diameter, and for initiating preliminary make-ready of the web on the new roll in response to a make-ready control signal originated at a time in advance of said splice control signal which is varied as a function of printing press web velocity, means developing an anticipate control signal originated at a time in advance of said make-ready control signal which is of constant duration irrespective of printing press web velocity and comprising, in combination, first pulse generating means producing a reference pulse during a portion of each revolution of said expiring roll, second pulse generating means activated in each period of revolution of the expiring roll at a constant time relative to said reference pulse and producing a first enabling pulse whose time position following said reference pulse approaches a succeeding reference pulse with diminishing expiring roll diameter and varies as a function of printing press web velocity, coincidence circuit means originating said splice control signal when a succeeding one of said reference pulses and said first enabling pulse coincide in time, third pulse generating means activated in each period of revolution of the expiring roll at a constant time following said first enabling pulse and producing a second enabling pulse whose time position with respect to said first enabling pulse is constant irrespective of printing press web velocity, coincidence circuit means originating said make-ready contrOl signal when said succeeding one of said reference pulses and said second enabling pulse coincide in time, fourth pulse generating means activated in each period of revolution of the expiring roll at a constant time relative to said second enabling pulse and producing a third enabling pulse whose time position with respect to said second enabling pulse varies as an inverse function of printing press web velocity; and coincidence circuit means originating said anticipate control signal when said succeeding one of said reference pulses and said third enabling pulse coincide in time, said anticipate control signal existing a constant time in advance of said splice control signal irrespective of printing press web velocity.

Claim 9

The invention defined by claim 4 wherein said second pulse generating means further comprises an adjustment means, said second pulse generator adjustment means being adjustable to vary the time position of said first enabling pulse with respect to said succeeding reference pulse for a predetermined expiring roll diameter.

Claim 10

The invention defined by claim 4 wherein said fourth pulse generating means further comprises an adjustment means, said fourth pulse generator adjustment means being adjustable to produce a third enabling pulse whose time position with respect to said second enabling pulse varies as a non-linear, hyperbola-like inverse function of printing press web velocity.

Claim 11

The invention defined by claim 4 wherein said fourth pulse generating means further comprises an adjustment means, said fourth pulse generator adjustment means being adjustable to vary the time position of said third enabling pulse with respect to said second enabling pulse to thereby vary the constant time of said anticipate control signal in advance of said make-ready control signal.